Why should tests for density and refractive index not exceed a ...

[pane00]

Why should tests for density and refractive index not exceed a certain level of sensitivity?
 
  What will be an ideal response?

Question 2

Community policing is referred to as activities conducted by law enforcement officers to enhance public relations between police and the community.
 
  a. True b. False

[Brummell1998]

Answer to Question 1

Glass fragments removed from a single sheet of plate glass may not have a uniform density or refractive index value; instead, their values may vary slightly. For comparison purposes, the difference in refractive index between a standard/reference and questioned glass must exceed this value. If the test is too sensitive, it may indicate that two fragments come from different sources when they actually come from different parts of a single plate of glass.

Answer to Question 2

a